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Merged
mauri870 merged 1 commit into from
Nov 3, 2026
+27 −6
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testdata: compare NaN results with the same machine's scalar build #8

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11 changes: 9 additions & 2 deletions testdata/abs_sqrt.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -4,9 +4,15 @@
# float32. The inputs include -0, infinities, NaNs, and negative numbers, and the
# output is compared bit for bit.

# testmain/output was recorded on amd64: a NaN that an operation creates (the square
# root of a negative number, 0 times infinity) has the sign bit set there and clear
# on arm64, so the recording is compared only on amd64, and on every target the
# simd build is compared with the scalar build of the same machine.

# The scalar program is the reference behavior.
exec go run ./testmain
cmp stdout testmain/output
[GOARCH:amd64] cmp stdout testmain/output
cp stdout scalar.out

cp ops.go ops.go.orig
loopvec -split .
Expand All @@ -18,7 +24,8 @@ cmp ops.go ops.go.guarded
# The simd build must behave identically.
env GOEXPERIMENT=simd
exec go run ./testmain
cmp stdout testmain/output
[GOARCH:amd64] cmp stdout testmain/output
cmp stdout scalar.out

-- go.mod --
module example.com/test
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11 changes: 9 additions & 2 deletions testdata/activation_temp.txt
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Expand Up @@ -4,8 +4,14 @@
# if/else if, then use it. Results must match the scalar loop bit for bit, NaN,
# infinities and signed zeros included.

# testmain/output was recorded on amd64: a NaN that an operation creates (the square
# root of a negative number, 0 times infinity) has the sign bit set there and clear
# on arm64, so the recording is compared only on amd64, and on every target the
# simd build is compared with the scalar build of the same machine.

exec go run ./testmain
cmp stdout testmain/output
[GOARCH:amd64] cmp stdout testmain/output
cp stdout scalar.out

cp ops.go ops.go.orig
loopvec -split .
Expand All @@ -16,7 +22,8 @@ cmp ops.go ops.go.guarded

env GOEXPERIMENT=simd
exec go run ./testmain
cmp stdout testmain/output
[GOARCH:amd64] cmp stdout testmain/output
cmp stdout scalar.out

-- go.mod --
module example.com/test
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11 changes: 9 additions & 2 deletions testdata/invariant_call.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -3,8 +3,14 @@
# the call is evaluated once before the loop. The results must match the scalar loop
# bit for bit, which is the only way to compare NaN and negative zero.

# testmain/output was recorded on amd64: a NaN that an operation creates (the square
# root of a negative number, 0 times infinity) has the sign bit set there and clear
# on arm64, so the recording is compared only on amd64, and on every target the
# simd build is compared with the scalar build of the same machine.

exec go run ./testmain
cmp stdout testmain/output
[GOARCH:amd64] cmp stdout testmain/output
cp stdout scalar.out

cp ops.go ops.go.orig
loopvec -split .
Expand All @@ -15,7 +21,8 @@ cmp ops.go ops.go.guarded

env GOEXPERIMENT=simd
exec go run ./testmain
cmp stdout testmain/output
[GOARCH:amd64] cmp stdout testmain/output
cmp stdout scalar.out

-- go.mod --
module example.com/test
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